i got a rejection from another top university today, so it looks like I have no chance for harvard. :( guess i'm not in the position to answer these questions.
anyway, i'm not sure about GREs (some say 85th percentile or above), but they require something like 213 or 230 for TOEFL, depending on the dept. anyway, check out their website if you haven't : http://www.gsas.harvard.edu/admissions/
good luck for your applications!